DOCSLIB.ORG

Cisco IP Video Telephony Solution Reference Network Design (SRND) Cisco Callmanager Release 4.0 July 2004

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

Cisco IP Video Telephony Solution Reference Network Design (SRND) Cisco CallManager Release 4.0 July 2004 Corporate Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387) Fax: 408 526-4100 Customer Order Number: 9562740406 THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCTS. THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY. The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB’s public domain version of the UNIX operating system. All rights reserved. Copyright © 1981, Regents of the University of California. NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED “AS IS” WITH ALL FAULTS. CISCO AND THE ABOVE-NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. CCSP, the Cisco Square Bridge logo, Cisco Unity, Follow Me Browsing, FormShare, and StackWise are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn, and iQuick Study are service marks of Cisco Systems, Inc.; and Aironet, ASIST, BPX, Catalyst, CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Empowering the Internet Generation, Enterprise/Solver, EtherChannel, EtherFast, EtherSwitch, Fast Step, GigaDrive, GigaStack, HomeLink, Internet Quotient, IOS, IP/TV, iQ Expertise, the iQ logo, iQ Net Readiness Scorecard, LightStream, Linksys, MeetingPlace, MGX, the Networkers logo, Networking Academy, Network Registrar, Packet, PIX, Post-Routing, Pre-Routing, ProConnect, RateMUX, Registrar, ScriptShare, SlideCast, SMARTnet, StrataView Plus, SwitchProbe, TeleRouter, The Fastest Way to Increase Your Internet Quotient, TransPath, and VCO are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United States and certain other countries. All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0406R) Cisco IP Video Telephony Solution Reference Network Design (SRND) Copyright © 2004 Cisco Systems, Inc. All rights reserved. CONTENTS Preface vii New or Changed Information for This Release vii Revision History vii Obtaining Documentation viii Cisco.com viii Ordering Documentation viii Documentation Feedback viii Obtaining Technical Assistance ix Cisco Technical Support Website ix Submitting a Service Request ix Definitions of Service Request Severity ix Obtaining Additional Publications and Information x CHAPTER 1 Introduction 1-1 IP Video Telephony Solution Components 1-1 Video Enhancements in Cisco CallManager 4.0 1-2 Protocols 1-2 Administration 1-4 Video Capabilities Per Device 1-4 Video Bandwidth Per Call 1-6 Video Bandwidth Per Location 1-6 Video Conference Bridge Resources 1-7 Serviceability 1-7 CHAPTER 2 Deployment Models 2-1 Single-Site Model 2-1 Multisite Model with Centralized Call Processing 2-2 Multisite Model with Distributed Call Processing 2-4 Cisco IP Video Telephony SRND 9562740406 iii Contents CHAPTER 3 Endpoints 3-1 SCCP Endpoints 3-1 Cisco VT Advantage 3-1 Codecs Supported by VT Advantage 3-3 PC Requirements 3-3 Tandberg SCCP Endpoints (T-1000 and T-550 Models) 3-4 H.323 Clients 3-5 Addressing for H.323 Clients 3-7 IP Address Matching for H.323 Clients 3-7 CHAPTER 4 Call Admission Control 4-1 Bandwidth Requirements 4-1 Media Channels 4-1 Bandwidth Used Per Call 4-2 Call Admission Control Within a Cluster 4-4 Regions 4-4 Locations 4-6 Call Admission Control Between Clusters 4-7 Non-Gatekeeper Controlled Intercluster Trunks 4-7 Gatekeeper-Controlled Intercluster Trunks 4-9 H.225 Gatekeeper-Controlled Trunks 4-9 Gatekeeper Bandwidth Values 4-9 Bandwidth Requests (BRQ) Enabled/Disabled 4-10 Retry Video Call as Audio 4-10 Wait for Far-End to Send TCS 4-12 CHAPTER 5 Quality of Service 5-1 Traffic Classification and Trust 5-2 Scheduling or Queuing 5-4 Queuing in the Campus 5-4 Queuing in the WAN 5-5 Bandwidth Provisioning 5-5 Traffic Shaping 5-5 Compressed RTP (cRTP) 5-5 Link Fragmentation and Interleaving (LFI) 5-6 Cisco IP Video Telephony SRND iv 9562740406 Contents Endpoint QoS Classification 5-6 Cisco VT Advantage with a Cisco IP Phone 5-6 Tandberg SCCP Endpoints 5-7 H.323 Video Endpoints 5-7 ACL and Policing Support 5-8 CHAPTER 6 Gateways 6-1 Routing Inbound Calls from the PSTN 6-3 Routing Outbound Calls to the PSTN 6-4 Automated Alternate Routing (AAR) 6-5 Least-Cost Routing 6-7 ISDN B-Channel Binding, Rollover, and Busy Out 6-7 Inbound Calls 6-8 Outbound Calls 6-9 Configuring the Gateways in Cisco CallManager 6-9 Call Signaling Port Numbers 6-10 Call Signaling Timers 6-10 Voice Gateways Compatibility 6-10 CHAPTER 7 Multipoint Conferencing 7-1 SCCP MCU Resources 7-3 Media Resource Groups and Lists 7-4 H.323 MCU Resources 7-5 Service Templates and Prefixes 7-6 Gatekeeper Registration and Call Routing 7-7 Sizing the MCU 7-7 IVR for Dial-In Conference 7-8 CHAPTER 8 Gatekeepers 8-1 Endpoint Gatekeepers 8-2 Zone Definitions 8-2 Zone Prefixes and Technology Prefixes 8-3 Zone Subnets 8-4 Disabling the Use of Proxy 8-5 Intercluster Trunk Gatekeeper 8-5 Zone Definition and Prefixes 8-5 Bandwidth Management 8-6 Cisco IP Video Telephony SRND 9562740406 v Contents Supported Gatekeeper Platforms 8-6 Gatekeeper Redundancy 8-7 CHAPTER 9 Applications 9-1 CTI Applications 9-1 Cisco Emergency Responder 9-1 Cisco IP Manager Assistant 9-2 Cisco IP Interactive Voice Response and Cisco IP Contact Center 9-2 Cisco Attendant Console 9-2 Cisco Personal Assistant 9-2 Cisco IP SoftPhone 9-3 Collaboration Solutions 9-3 T.120 Application Sharing 9-3 Cisco MeetingPlace 9-3 Wireless Networking Solutions 9-3 Cisco Aironet 802.11b Networking Solutions 9-3 Cisco Wireless IP Phone 7920 9-4 XML Services 9-4 CHAPTER 10 Security 10-1 Separating the Voice and Data VLANs 10-1 IP Phone Security Settings 10-2 Network Address Translation 10-2 Firewalls 10-3 Protecting the Video Infrastructure 10-3 Blocking Unauthorized Video Calls 10-3 I NDEX Cisco IP Video Telephony SRND vi 9562740406 Preface This document provides design considerations and guidelines for implementing Cisco IP Video Telephony solutions based on the Cisco Architecture for Voice, Video, and Integrated Data (AVVID). This document builds upon ideas and concepts presented in the Cisco IP Telephony Solution Reference Network Design (SRND), which is available online at http://cisco.com/go/srnd This document assumes that you are already familiar with the basic terms and concepts presented in the Cisco IP Telephony SRND. To review any of those terms and concepts, refer to the documentation at the preceding URL. New or Changed Information for This Release Unless stated otherwise, the information in this document applies specifically to Cisco CallManager Release 4.0. Table 1 lists the topics that are new in the current release of this document or that have changed significantly from previous releases of Cisco CallManager. Table 1 New or Changed Information for Cisco CallManager Release 4.0 Topic Described in: IP Video Telephony features and capabilities Video Enhancements in Cisco CallManager 4.0, page 1-2 Revision History This document may be updated at any time without notice. You can obtain the latest version of this document online at http://cisco.com/go/srnd Visit this Cisco.com website periodically and check for documentation updates by comparing the revision date on the front title page of your copy with the revision date of the most recent online version at the preceding URL. The following table lists the revision history for this document. Revision Date Comments July, 2004 Initial version of this document for Cisco CallManager Release 4.0. Cisco IP Video Telephony SRND 9562740406 vii Preface Obtaining Documentation Obtaining Documentation Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several ways to obtain technical assistance and other technical resources. These sections explain how to obtain technical information from Cisco Systems. Cisco.com You can access the most current Cisco documentation at this URL: http://www.cisco.com/univercd/home/home.htm You can access the Cisco website at this URL: http://www.cisco.com You can access international Cisco websites at this URL: http://www.cisco.com/public/countries_languages.shtml Ordering Documentation You can find instructions for ordering documentation at this URL: http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htm You can order Cisco documentation in these ways: • Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from the Ordering tool: http://www.cisco.com/en/US/partner/ordering/index.shtml • Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco Systems Corporate Headquarters (California, USA) at 408 526-7208 or, elsewhere in North America, by calling 800 553-NETS (6387).
Recommended publications
  • Fax, Modem, and Text Support Over IP Configuration Guide, Cisco IOS Release 15M&T

    Fax, Modem, and Text Support Over IP Configuration Guide, Cisco IOS Release 15M&T

    Fax, Modem, and Text Support over IP Configuration Guide, Cisco IOS Release 15M&T Last Modified: 2015-07-31 Americas Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387) Fax: 408 527-0883 THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCTS. THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY. The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB's public domain version of the UNIX operating system. All rights reserved. Copyright © 1981, Regents of the University of California. NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED “AS IS" WITH ALL FAULTS. CISCO AND THE ABOVE-NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
  • Application Note IPTV Services

    Application Note IPTV Services

    Application Note Contents Title Managing IPTV Performance Overview.......................................................... 1 Series IP Video Performance Management IPTV Services .................................................. 1 Date February 2008 Factors Affecting the Performance of IPTV.... 2 Video Impairments .......................................... 4 Video Performance Metrics ................................ 5 IPTV, Internet TV, and Video on Demand provide exciting new revenue opportunities IPTV Performance Management ........................ 6 for service providers. This Application Note Summary .......................................................... 8 describes some of the typical issues and problems affecting IPTV service quality, and introduces a cost-effective approach to service quality monitoring. IPTV Services make it publicly available. IPTV offers exciting new opportunities for service • Video on Demand (VOD) is a service that providers to introduce integrated voice, video, and provides access to movies or other video data services over broadband. A number of video content on demand. This could be part service types can be delivered over IP: of an IPTV service or could be a service offered independently over the Internet. • “IPTV” is generally used to refer to a closed Video over IP service with a broad range In some cases, IPTV services are not seen as of content delivered by a service provider. directly competing with existing cable or satellite Some definitions of IPTV would suggest service but may provide some
  • Participant Reference Guide

    Participant Reference Guide

    Participant Reference Guide Table of Contents Introduction System Requirements Definitions Audio Conferencing How to Join Phone Keypad Commands Playback Instructions Online Meetings How to Join Meeting Wall Meeting Resources Chat Radio Technical Support Introduction FreeConferenceCall.com is an intuitive and agile collaboration tool packed with features to allow participants to join audio conference calls and online meetings. All accounts include high-definition audio, screen sharing and video conferencing for up to 1,000 participants at no cost. During a conference, use phone keypad commands to mute, hear instructions and more. Access the host’s Meeting Wall to find important information and resources for a meeting. For assistance, go to www.freeconferencecall.com/support to live chat with 24/7 Customer ​ ​ Care, email [email protected] or call (844) 844-1322. ​ ​ System Requirements FreeConferenceCall.com audio conferencing can be accessed at any time by calling from a landline, mobile phone, VoIP call (through the internet using a computer, tablet or mobile device) or a third-party VoIP call. In order to access the FreeConferenceCall.com website and use online meetings with screen sharing and video conferencing, the following system requirements must be met: Browsers: ● Chrome™ 29 or newer (recommended) ● Firefox® 22 or newer ● Safari® 6.0 or newer (Mac only) ● Internet Explorer® 10 or newer (Windows only) (Javascript) Operating systems: ● Windows 7 and up ● Mac OS X 10.7 and up ● Ubuntu 14.04 and up Note for Linux: ○ Preferred Windows Manager environment: Compiz ○ Desktop Environment: Unity, Gnome ● Bandwidth 100Kb/s (HD Audio), 400Kb/s (screen sharing), 500 Kb/s (video) ● Video camera supported by OS, integrated or external Definitions In order to use the FreeConferenceCall.com reference guide effectively, the following list of terminology has been provided: ● Dial-in number - A phone number that is dialed to join a meeting.
  • Title: Communicating with Light: from Telephony to Cell Phones Revision

    Title: Communicating with Light: from Telephony to Cell Phones Revision

    Title: Communicating with Light: From Telephony to Cell Phones Revision: February 1, 2006 Authors: Jim Overhiser, Luat Vuong Appropriate Physics, Grades 9-12 Level: Abstract: This series of six station activities introduces the physics of transmitting "voice" information using electromagnetic signals or light. Students explore how light can be modulated to encode voice information using a simple version of Bell's original photophone. They observe the decrease of the intensity of open-air signals by increasing the distance between source and receiver, and learn the advantage of using materials with different indices of refraction to manipulate and guide light signals. Finally, students are introduced to the concept of bandwidth by using two different wavelengths of light to send two signals at the same time. Special Kit available on loan from CIPT lending library. Equipment: Time Required: Two 80-minute periods NY Standards 4.1b Energy may be converted among mechanical, electromagnetic, Met: nuclear, and thermal forms 4.1j Energy may be stored in electric or magnetic fields. This energy may be transferred through conductors or space and may be converted to other forms of energy. 4.3b Waves carry energy and information without transferring mass. This energy may be carried by pulses or periodic waves. 4.3i When a wave moves from one medium into another, the waves may refract due a change in speed. The angle of refraction depends on the angle of incidence and the property of the medium. 4.3h When a wave strikes a boundary between two media, reflection, transmission, and absorption occur. A transmitted wave may be refracted.
  • Fast Detection of Forgery Image Using Discrete Cosine Transform Four Step Search Algorithm

    Fast Detection of Forgery Image Using Discrete Cosine Transform Four Step Search Algorithm

    Journal of Korea Multimedia Society Vol. 22, No. 5, May 2019(pp. 527-534) https://doi.org/10.9717/kmms.2019.22.5.527 Fast Detection of Forgery Image using Discrete Cosine Transform Four Step Search Algorithm Yong-Dal Shin†, Yong-Suk Cho†† ABSTRACT Recently, Photo editing softwares such as digital cameras, Paintshop Pro, and Photoshop digital can create counterfeit images easily. Various techniques for detection of tamper images or forgery images have been proposed in the literature. A form of digital forgery is copy-move image forgery. Copy-move is one of the forgeries and is used wherever you need to cover a part of the image to add or remove information. Copy-move image forgery refers to copying a specific area of an image itself and pasting it into another area of the same image. The purpose of copy-move image forgery detection is to detect the same or very similar region image within the original image. In this paper, we proposed fast detection of forgery image using four step search based on discrete cosine transform and a four step search algorithm using discrete cosine transform (FSSDCT). The computational complexity of our algorithm reduced 34.23 % than conventional DCT three step search algorithm (DCTTSS). Key words: Duplicated Forgery Image, Discrete Cosine Transform, Four Step Search Algorithm 1. INTRODUCTION and Fig. 1(b) shows an original image and a copy- moved forged image respectively. Digital cameras and smart phones, and digital J. Fridrich [1] proposed an exacting match image processing software such as Photoshop, method for the forged image detection of a copy- Paintshop Pro, you can duplicate digital counterfeit move forged image.
  • Softphone - Cisco IP Communicator FAQ

    Softphone - Cisco IP Communicator FAQ

    Softphone - Cisco IP Communicator FAQ Getting Started Q. How do I order a Softphone instead of a Desk Phone? You can select a Softphone by the following process; Log a request via the Raise a Service Request button on the bottom of the page get a desk phone to get a Softphone: The form you need to fill in is under – Phones, Faxes, Mobiles and Accessories-- >Desk Phones and Accessories A. Fill in all the required details on the form, to select a Softphone, check the “Phone 1” Box and select the Softphone option from the drop down menu in “New Handset you require” As a softphone requires a headset, please select an option, the standard wired headset will be supplied at no charge, if you require a wireless headset, select this option and we will contact you do discuss the additional costs If you require a Softphone as well as a desk phone, this can be provided but an additional cost of $150 is required to cover the costs of the additional licencing. Q. What is Cisco IP Communicator? Cisco IP Communicator is a desktop application that turns your computer into a full- A. featured Cisco Unified IP Phone, allowing you to place, receive, and otherwise handle calls from any location where you can connect to the corporate network. For example, if you are on a business trip, you can use your IP Communicator to receive calls and check voice messages while you are online. Or, if you are working from home, co-workers can reach you by dialing your work number.
  • IP Telephony Fundamentals: What You Need to Know to “Go to Market”

    IP Telephony Fundamentals: What You Need to Know to “Go to Market”

    IP Telephony Fundamentals: What You Need to Know to “Go To Market” Ken Agress Senior Consultant PlanNet Consulting What Will Be Covered • What is Voice over IP? • VoIP Technology Basics • How Do I Know if We’re Ready? • What “Real” Cost Savings Should I Expect? • Putting it All Together • Conclusion, Q&A 2 What is Voice Over IP? • The Simple Answer – It’s your “traditional” voice services transported across a common IP infrastructure. • The Real Answer – It’s the convergence of numerous protocols, components, and requirements that must be balanced to provide a quality voice experience. 3 Recognize the Reality of IP Telephony • IP is the catalyst for convergence of technology and organizations • There are few plan templates for convergence projects • Everybody seems to have a strong opinion • Requires an educational investment in the technology (learning curve) – Requires an up-front investment in the technology that can be leveraged for subsequent deployments • Surveys indicate deployment is usually more difficult than anticipated • Most implementations are event driven (that means there is a broader plan) 4 IP Telephony vs. VoIP • Voice over IP – A broad technology that encompasses many, many facets. • IP Telephony – What you’re going to implement to actually deliver services across your network – Focuses more on features than possibilities – Narrows focus to specific implementations and requirements – Sets appropriate context for discussions 5 Why Does Convergence Matter? • Converged networks provide a means to simplify support structures and staffing. • Converged networks create new opportunities for a “richer” communications environment – Improved Unified Messaging – Unified Communications – The Promise of Video • Converged networks provide methods to reduce costs (if you do things right) 6 The Basics – TDM (vs.
  • SERVIZIO VOIP Dal 2005 Ci Siamo Specializzati Nella Fornitura Di

    SERVIZIO VOIP Dal 2005 Ci Siamo Specializzati Nella Fornitura Di

    SERVIZIO VOIP Dal 2005 ci siamo specializzati nella fornitura di servizi VOIP (Voice Over IP) di elevata qualità, con un’offerta tecnologicamente evoluta, posizionandoci in un segmento di mercato di nicchia. Abbiamo così realizzato un servizio basato su una tecnologia allo stato dell'arte che permette di sostituire le linee telefoniche tradizionali con linee VOIP, garantendone la stessa affidabilità e qualità . guarda il video di presentazione PLUS - Casi di successo documentati (rif. nostro sito Web www.timenet.it – sezione Case History) - Portabilità di ogni tipo di linea , comprese Selezioni Passanti (GNR) su BRI e PRI, dai tutti i principali Operatori , con programmazione temporale concordata con il Cliente della data del passaggio delle linee. - Servizio di backup : è sempre garantita la raggiungibilità del Cliente - Videochiamate punto – punto tra due numerazioni VOIP. - Servizio di deviazione di chiamata e voicemail . - Azzeramento dei costi fissi (canoni linee telefoniche). - Tariffe chiare, senza scatto alla risposta, conteggiate per gli effettivi secondi di conversazione. - Nuove numerazioni geografiche singole o GNR. - Numero di chiamate simultaneo illimitato anche con un solo numero VOIP. - Compatibilità testata con le maggiori piattaforme hardware (centralini e gateway): Avaya, AAstra, Samsung, Siemens, Asterisk, Patton, Audiocodes, Draytek, Linksys, etc… APPROFONDIMENTI CHE TIPO DI LINEE POSSIAMO PORTARE - Linee analogiche (POTS) e ISDN numero principale più numerazioni aggiuntive - Linee ISDN e PRI GNR (Selezione Passante) 10, 100, 1000 numeri - Linee in ULL e native VOIP di altri Operatori DA QUALI OPERATORI POSSIAMO EFFETTUARE LA NUMBER PORTABILITY Possiamo effettuare Number Portability da tutti i principali Operatori: Telecom Italia (anche numerazioni VoIP Alice Business Voce), BT-Albacom, Eutelia, Fastweb, Vodafone e Wind .
  • What Is the Impact of Mobile Telephony on Economic Growth?

    What Is the Impact of Mobile Telephony on Economic Growth?

    What is the impact of mobile telephony on economic growth? A Report for the GSM Association November 2012 Contents Foreword 1 The impact of mobile telephony on economic growth: key findings 2 What is the impact of mobile telephony on economic growth? 3 Appendix A 3G penetration and economic growth 11 Appendix B Mobile data usage and economic growth 16 Appendix C Mobile telephony and productivity in developing markets 20 Important Notice from Deloitte This report (the “Report”) has been prepared by Deloitte LLP (“Deloitte”) for the GSM Association (‘GSMA’) in accordance with the contract with them dated July 1st 2011 plus two change orders dated October 3rd 2011 and March 26th 2012 (“the Contract”) and on the basis of the scope and limitations set out below. The Report has been prepared solely for the purposes of assessing the impact of mobile services on GDP growth and productivity, as set out in the Contract. It should not be used for any other purpose or in any other context, and Deloitte accepts no responsibility for its use in either regard. The Report is provided exclusively for the GSMA’s use under the terms of the Contract. No party other than the GSMA is entitled to rely on the Report for any purpose whatsoever and Deloitte accepts no responsibility or liability or duty of care to any party other than the GSMA in respect of the Report or any of its contents. As set out in the Contract, the scope of our work has been limited by the time, information and explanations made available to us.
  • TELEPHONE TRAINING GUIDE] Fall 2010

    TELEPHONE TRAINING GUIDE] Fall 2010

    [TELEPHONE TRAINING GUIDE] Fall 2010 Telephone Training Guide Multi Button and Single Line Telephones Office of Information Technology, - UC Irvine 1 | Page [TELEPHONE TRAINING GUIDE] Fall 2010 Personal Profile (optional) ........................................... 10 Group Pickup (optional) ............................................... 10 Table of Contents Abbreviated Dialing (optional) ..................................... 10 Multi-Button Telephone General Description Automatic Call-Back ..................................................... 10 ....................................................................................... 3 Call Waiting .................................................................. 10 Keys and Buttons ............................................................ 3 Campus Dialing Instructions ............................ 11 Standard Preset Function Buttons .................................. 3 Emergency 911 ............................................................. 11 Sending Tones (TONE) .................................................... 4 Multi-Button Telephone Operations ................ 4 Answering Calls ............................................................... 4 Placing Calls .................................................................... 4 Transferring Calls ............................................................ 4 Inquiry Calls .................................................................... 4 Exclusive Hold ................................................................. 4
  • Cruising the Information Highway: Online Services and Electronic Mail for Physicians and Families John G

    Cruising the Information Highway: Online Services and Electronic Mail for Physicians and Families John G

    Technology Review Cruising the Information Highway: Online Services and Electronic Mail for Physicians and Families John G. Faughnan, MD; David J. Doukas, MD; Mark H. Ebell, MD; and Gary N. Fox, MD Minneapolis, Minnesota; Ann Arbor and Detroit, Michigan; and Toledo, Ohio Commercial online service providers, bulletin board ser­ indirectly through America Online or directly through vices, and the Internet make up the rapidly expanding specialized access providers. Today’s online services are “information highway.” Physicians and their families destined to evolve into a National Information Infra­ can use these services for professional and personal com­ structure that will change the way we work and play. munication, for recreation and commerce, and to obtain Key words. Computers; education; information services; reference information and computer software. Com m er­ communication; online systems; Internet. cial providers include America Online, CompuServe, GEnie, and MCIMail. Internet access can be obtained ( JFam Pract 1994; 39:365-371) During past year, there has been a deluge of articles information), computer-based communications, and en­ about the “information highway.” Although they have tertainment. Visionaries imagine this collection becoming included a great deal of exaggeration, there are some the marketplace and the workplace of the nation. In this services of real interest to physicians and their families. article we focus on the latter interpretation of the infor­ This paper, which is based on the personal experience mation highway. of clinicians who have played and worked with com­ There are practical medical and nonmedical reasons puter communications for the past several years, pre­ to explore the online world. America Online (AOL) is one sents the services of current interest, indicates where of the services described in detail.
  • Avaya IP Softphone Release 4 Version 1 Online Reference

    Avaya IP Softphone Release 4 Version 1 Online Reference

    Avaya IP Softphone Release 4 Version 1 Online Reference September 2002 About This Guide This guide presents the information contained in the Avaya IP Softphone R4 Version 1 online help. 1 About Avaya IP Softphone Introduction Avaya IP Softphone is a collection of computer telephony integration (CTI) applications that enables you to control telephone calls (both incoming and outgoing) directly from your PC. Avaya IP Softphone enables you to log into your company's server remotely and make and receive telephone calls from the telephone extension. Avaya IP Softphone increases your telecommunications capabilities by providing the following applications: • Avaya IP Softphone Avaya IP Softphone is an application that enables you to control your telephone calls (both incoming and outgoing) directly from your PC. • Avaya iClarity IP Audio Avaya iClarity IP Audio is an application that performs the following functions: o Enables you to log into the server. You must be logged into the server before you can use Avaya IP Softphone to control your telephone calls. o Handles the voice communications when you use Avaya IP Softphone in the Road Warrior configuration (voice over IP). When you make or receive a call with Avaya IP Softphone, Avaya iClarity IP Audio enables you to speak to and hear the other party via a headset connected to your PC or the PC’s microphone and speakers. Avaya IP Softphone Configurations Avaya IP Softphone supports the following three configurations: • Road Warrior Configuration (Voice over IP) The Road Warrior configuration enables travelers to use the full feature set of your company's telephone system from temporary remote locations anywhere in the world (such as a hotel room).